depfile

Simply parse .d files.

use std::borrow::Cow;

fn main() {

    let input = r"
x.cpp.o: x.cpp \
  include/foo.h \
  include/bar.h
include/foo.h:
include/bar.h: fiz.h
";

    let targets = depfile::parse(input).expect("syntax error");
    for dep in targets.recurse_deps("x.cpp.o") {
        println!("x.cpp.o depends on: {dep}");
    }
}

See documentation on docs.rs